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-13 or +13 are both square root of 169, but we often use the positive square root, 13, as the principal square root.
No. The square root of a positive integer is either a whole number or it is irrational.
+6 is the positive square root of 36.
The positive square root of 289 is 17.
The square root of a positive number results in a positive number. For example, the square root of 25 is 5. * * * * * Not true! There are two real square roots for every positive number: one positive and one negative. -5 is as much a square root of 25 as +5 is. However, the positive root is the principal root and so is often presented as the only root.